Marine clock for yacht

Through the design of the detachable chassis and folding device, the problems of difficulty in installing the existing yacht bells and poor environmental adaptability are solved, and simple wall-mounted and floor-mounted installation is achieved, which improves the adaptability of the yacht bells.

CN223296289UActive Publication Date: 2025-09-02SELWAY YACHT (JIANGMEN) CO LTD
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Patent Information

Application Number
CN202423221050.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-25
Publication Date
2025-09-02
Estimated Expiration
2034-12-25

AI Technical Summary

Technical Problem

The installation and disassembly of existing yacht bells is difficult to install and disassemble, and it is impossible to achieve both wall-mounted and floor-mounted installation, and the environmental adaptability is poor.

Method used

The detachable chassis device and positionable folding device are adopted. The chassis and the chassis sleeve are removably connected, and the folding arm is cooperated with the locking mechanism to realize the wall-mounted and floor-standing installation of the boat bell, and simple installation and disassembly are achieved through the hinging and locking mechanism.

Benefits of technology

It simplifies the installation and disassembly process of the ship clock, improves the environmental adaptability of the ship clock, and can achieve both wall-mounted and floor-mounted installation.

✦ Generated by Eureka AI based on patent content.

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Abstract

A ship clock for a yacht comprises a detachable chassis device, the chassis device comprises a chassis sleeve and a chassis arranged in the chassis sleeve in a sleeved mode, the chassis is detachably connected with the chassis sleeve, an opening is formed in the A side of the chassis sleeve, and a connecting hole is formed in the chassis; the positionable folding device is connected to the chassis device and comprises a first folding arm, a second folding arm hinged to the first folding arm and a locking mechanism, one end of the first folding arm is connected to the chassis, the other end of the first folding arm is provided with a hinge joint, and the two opposite ends of the second folding arm are provided with hinge seats; a hinging seat at one end of the first folding arm is matched with a hinging head of the first folding arm; the ship clock body is hinged to the folding device, the ship clock body is matched with a hinge seat at the other end of the second folding arm, the radius L1 of a clock opening is smaller than the length L2 of the first folding arm, the length L3 of the second folding arm is larger than the height H of the ship clock body, operation is easy and convenient in the mounting and dismounting process of the ship clock, and the ship clock can be mounted in a wall-mounted mode and can also be mounted in a wall-mounted mode. Floor type installation can be achieved, and the environmental adaptability of the ship clock is improved.
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Description

Technical Field

[0001] The present application relates to the technical field of ship bells, and in particular to a ship bell for yachts. Background Art

[0002] With the improvement of people's living standards, the demand for various small and medium-sized yachts is increasing. In order to meet the sightseeing, leisure and entertainment activities of yacht owners, ship bells are needed to meet the daily sea needs of yachts in order to notify the crew of various matters in a more timely manner and issue corresponding alarms based on the sea conditions, as well as to meet the coordination and aesthetics of the overall space of the yacht.

[0003] In the prior art, the ship bell used in yachts is directly drilled on the bulwark or the surrounding wall and fixed with bolts. The installation of the ship bell when it is in use and the removal of the ship bell when it is not in use are difficult, time-consuming and labor-intensive. In addition, the existing ship bell cannot meet the requirements of both wall-mounted installation and floor-standing installation in different usage environments, and has poor environmental adaptability. Utility Model Content

[0004] The embodiment of the utility model provides a ship bell for yachts, which is easy to operate during the installation and disassembly of the ship bell, and the ship bell can be installed in a wall-mounted manner or a floor-mounted manner, thereby improving the environmental adaptability of the ship bell.

[0005] To achieve the aforementioned objectives, this application adopts the following technical solutions:

[0006] A yacht bell, characterized by comprising

[0007] A detachable chassis device, comprising a chassis cover and a chassis mounted within the chassis cover, wherein the chassis and the chassis cover are detachably connected, wherein side A of the chassis cover is provided with an opening, and the chassis is provided with a connecting hole;

[0008] a positionable folding device connected to the chassis device, the folding device comprising a first folding arm, a second folding arm hinged to the first folding arm, and a locking mechanism, one end of the first folding arm being connected to the chassis, the other end of the first folding arm being provided with the hinged head, opposite ends of the second folding arm being provided with hinged seats, the hinged seat at one end of the second folding arm being adapted to engage with the hinged head of the first folding arm;

[0009] The ship bell body is hinged to the folding device, and the ship bell body cooperates with the hinge seat at the other end of the second folding arm. The bell mouth radius L1 of the ship bell body is smaller than the length L2 of the second folding arm, and the length L3 of the first folding arm is greater than the height H of the ship bell body.

[0010] In some optional embodiments, a clamping platform is provided on one end of the first folding arm close to the hinged joint, and the clamping platform abuts against the second folding arm.

[0011] In some optional embodiments, a limiting plate is provided on the hinge seat on the second folding arm close to one end of the first folding arm, and the limiting plate cooperates with the first folding arm.

[0012] In some optional embodiments, the locking mechanism includes a limit seat assembly, a plug and a locking assembly, the limit seat assembly is fixed to the B side of the hinge seat on the second folding arm near one end of the first folding arm, the plug is fixed to the C side of the hinge seat on the second folding arm near one end of the first folding arm, and the locking assembly passes through the limit seat assembly and is threadedly connected to the hinge seat.

[0013] In some optional embodiments, the limit seat assembly includes a first limit seat and a second limit seat arranged inside the first limit seat, a reinforcing rib is further provided between the first limit seat and the second limit seat, a limit platform is provided inside the first limit seat, and the height of the second limit seat is lower than the height of the limit platform.

[0014] In some optional embodiments, a through hole is further provided at the bottom of the limit seat assembly, the through hole is connected to the hinge hole on the hinge seat, and the center points of the first limit seat, the second limit seat, the through hole and the hinge hole all coincide.

[0015] In some optional embodiments, the hinge hole to which the plug is fixed is provided with an internal thread.

[0016] In some optional embodiments, the locking assembly includes a locking head and a locking rod connected to the locking head, the locking head includes a first locking head and a second locking head connected to the first locking head, and along the F direction are the first locking head, the second locking head and the locking rod in sequence, the first locking head cooperates with the first limit seat, and the second locking head cooperates with the second limit seat, the locking rod passes through the limit seat assembly through the through hole in sequence, and then passes through the C side of the hinge seat through the hinge hole, and is threadedly connected to the internal thread on the D side of the hinge seat.

[0017] The yacht bell provided in this application is not only suitable for use on yachts, but also for use on cargo ships, fishing boats, and speedboats during actual use.

[0018] The yacht bell provided in this application has the following beneficial effects:

[0019] In the technical solution adopted in the present application, the chassis cover in the detachable chassis device and the chassis arranged inside the chassis cover are detachably connected, the A side of the chassis cover is provided with an opening, and the chassis is provided with a connecting hole; the first folding arm and the second folding arm in the positionable folding device connected to the chassis device are hinged and locked and positioned by a locking mechanism, one end of the first folding arm is connected to the chassis, and the other end is provided with a hinge head, the hinge seat at one end of the second folding arm cooperates with the hinge head of the first folding arm, and the hinge seat at the other end of the second folding arm is hinged to the ship bell body, at the same time, the bell mouth radius L1 of the ship bell body is smaller than the length L2 of the second folding arm, and the length L3 of the first folding arm is greater than the height H of the ship bell body, so as to achieve simple operation during the installation and disassembly of the ship bell, and also achieve a ship bell that can be installed both on the wall and on the floor, thereby improving the environmental adaptability of the ship bell. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0021] Figure 1 This is a schematic diagram of a first usage scenario of a yacht clock according to the present application;

[0022] Figure 2 This is a schematic cross-sectional view of a chassis housing in a yacht bell according to the present application;

[0023] Figure 3 This is a partial structural diagram of a folding device in a yacht clock of the present application;

[0024] Figure 4 This is a schematic diagram of a second usage scenario of a yacht clock according to the present application;

[0025] Figure 5 yes Figure 4 An enlarged view of circle A is shown;

[0026] Figure 6 This is a partial structural diagram of the second folding arm of a yacht clock in the present application;

[0027] Figure 7 This is a three-dimensional schematic diagram of a limit seat assembly in a yacht clock of the present application;

[0028] Figure 8 yes Figure 7 An enlarged view of circle B is shown;

[0029] Figure 9 It is a three-dimensional schematic diagram of a locking assembly in a yacht bell according to the present application.

[0030] Reference numerals:

[0031] 10. Chassis device; 11. Chassis cover; 111. Opening; 12. Chassis; 121. Connection hole;

[0032] 20. Folding device; 21. First folding arm; 211. Hinge joint; 212. Clamping platform; 22. Second folding arm; 221. Hinge seat; 221A. Hinge hole; 2211. Limiting piece; 23. Locking mechanism; 231. Limiting seat assembly; 231A. Through hole; 2311. First limiting seat; 2311A. Limiting platform; 2312. Second limiting seat; 2313. Reinforcing rib; 232. Plug; 233. Locking assembly; 2331. Locking head; 23311. First locking head; 23312. Second locking head; 2332. Locking lever;

[0033] 30. Ship bell body. DETAILED DESCRIPTION

[0034] The following describes the specific implementation methods of the present application in conjunction with the accompanying drawings and examples. Through the contents of this specification, those skilled in the art can clearly and completely understand the technical solutions, technical problems solved, and technical effects produced by the present application. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. In addition, for ease of description, only the parts relevant to the present application are shown in the accompanying drawings.

[0035] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of the specification are only used to match the contents recorded in the specification for technical personnel in this field to understand and read, and are not used to limit the conditions for the implementation of this application. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0036] References such as "first", "second", "the" and similar words do not indicate a quantitative limitation and may indicate the singular or plural. The terms "include", "comprising", "having" and any variations thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or modules is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units inherent to these processes, methods, products or devices. Similar words such as "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may also include direct or indirect electrical connections.

[0037] It should also be noted that the longitudinal section corresponding to the embodiment of the present application may be a section corresponding to the front view direction, the transverse section may be a section corresponding to the right view direction, and the horizontal section may be a section corresponding to the top view direction.

[0038] In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of a first usage scenario of a yacht clock in this application. Figure 2 This is a cross-sectional diagram of a chassis 12 set 11 in a yacht clock of the present application. Figure 1 and Figure 2 As shown, a yacht bell comprises a detachable chassis 12 device 10 , a positionable folding device 20 connected to the chassis 12 device 10 , and a bell body 30 hinged to the folding device 20 .

[0040] Continue to refer Figure 1 and Figure 2 The chassis 12 device 10 includes a chassis 12 cover 11 and a chassis 12 mounted inside the chassis 12 cover 11. The chassis 12 and the chassis 12 cover 11 are detachably connected, wherein an opening 111 is provided on the A side of the chassis 12 cover 11 to avoid interference of the chassis 12 cover 11 with the folding device 20 when the chassis 12 cover 11 and the chassis 12 are mounted thereon. A connecting hole 121 is provided on the chassis 12 to enable the chassis 12 to be bolted to the mounting platform through the connecting hole 121 when the ship bell is installed on the floor.

[0041] Here, the chassis 12 sleeve 11 in the detachable chassis 12 device 10 and the chassis 12 arranged inside the chassis 12 sleeve 11 are detachably connected, an opening 111 is provided on the A side of the chassis 12 sleeve 11, and a connecting hole 121 is provided on the chassis 12 to achieve easy operation during the installation and disassembly of the ship bell.

[0042] Continue to refer Figure 1 , for reference Figure 3 、 Figure 4 and Figure 5 , Figure 3 This is a partial structural diagram of a folding device 20 in a yacht bell of the present application. Figure 4 This is a schematic diagram of the second usage scenario of a yacht clock in this application. Figure 5 yes Figure 4 The enlarged view of circle A is shown. Figure 1 、 Figure 3 、 Figure 4 and Figure 5As shown, the folding device 20 includes a first folding arm 21, a second folding arm 22 hinged to the first folding arm 21, and a locking mechanism 23. One end of the first folding arm 21 is connected to the chassis 12, and the other end thereof is provided with a hinge head 211. A clamping platform 212 is provided on the end of the first folding arm 21 close to the hinge head 211. The clamping platform 212 abuts against the second folding arm 22 to realize that the first folding arm 21 and the second folding arm 22 are in a floor-standing state to support the ship bell body 30. The length L2 of the second folding arm 22 is greater than the bell mouth radius L1 of the ship bell body 30.

[0043] Here, the length L2 of the second folding arm 22 is greater than the bell mouth radius L1 of the ship bell body 30, so that when the first folding arm 21 and the second folding arm 22 support the ship bell body 30 in a floor-standing state, they will not interfere with the ship bell body 30.

[0044] Continue to refer Figure 3 and Figure 4 The second folding arm 22 is provided with hinged seats 221 at opposite ends, which respectively engage with the hinged joint 211 of the first folding arm 21 and the bell body 30. Here, when the bell body 30 is hingedly connected to the second folding arm 22, the bell body 30 can freely rotate about the hinge axis, allowing the bell body 30 to be flipped about the axis to meet structural requirements when the bell body 30 is installed in a wall-mounted or floor-standing manner.

[0045] Continue to refer Figure 1 , for reference Figure 6 , Figure 6 This is a partial structural diagram of the second folding arm 22 in a yacht bell of the present application. Figure 6 As shown, a limiting piece 2211 is provided on the hinge seat 221 of the second folding arm 22 near one end of the first folding arm 21. Here, the limiting piece 2211 cooperates with the first folding arm 21 to achieve a hanging state of the first folding arm 21 and the second folding arm 22 to support the ship bell body 30.

[0046] Continue to refer Figure 4 The length L3 of the first folding arm 21 is greater than the height H of the ship bell body 30. Here, L3>H, so as to avoid interference between the ship bell body 30 and the ground or chassis 12 when the ship bell body 30 is floor-mounted.

[0047] Continue to refer Figure 6 The locking mechanism 23 includes a limit seat assembly 231, a plug 232 and a locking assembly 233. The limit seat assembly 231 is fixed to the B side of the hinge seat 221 on the second folding arm 22 close to one end of the first folding arm 21.

[0048] refer to Figure 7 and Figure 8 , Figure 7 This is a three-dimensional schematic diagram of a limit seat assembly 231 in a yacht clock of the present application. Figure 8 yes Figure 7 The enlarged view of circle B is shown. Figure 7 and Figure 8 As shown, the limit seat assembly 231 includes a first limit seat 2311 and a second limit seat 2312 arranged inside the first limit seat 2311. A reinforcing rib 2313 is also provided between the first limit seat 2311 and the second limit seat 2312 to enhance the firmness and stability of the second limit seat 2312 inside the first limit seat 2311. At the same time, a limit platform 2311A is provided inside the first limit seat 2311. With the bottom of the limit seat assembly 231 as the initial position, the height of the second limit seat 2312 is lower than the height of the limit platform 2311A. In addition, a through hole 231A is also provided at the bottom of the limit seat assembly 231. The through hole 231A is connected to the hinge hole 221A on the hinge seat 221, and the center points of the first limit seat 2311, the second limit seat 2312, the through hole 231A and the hinge hole 221A all coincide.

[0049] Continue to refer Figure 5 and Figure 6 The plug 232 is fixed to the C side of the hinge seat 221 on the second folding arm 22 close to one end of the first folding arm 21, and the hinge hole 221A on the side where the plug 232 is fixed is provided with an internal thread.

[0050] Continue to refer Figure 6 , for reference Figure 9 , Figure 9 This is a three-dimensional schematic diagram of a locking assembly 233 in a yacht bell of the present application. Figure 6 and Figure 9As shown, the locking assembly 233 passes through the limiting seat assembly 231 and is threadedly connected to the hinge seat 221. The locking assembly 233 includes a locking head 2331 and a locking rod 2332 connected to the locking head 2331. The locking head 2331 includes a first locking head 23311 and a second locking head 23312 connected to the first locking head 23311. Along the F direction, there are the first locking head 23311, the second locking head 23312 and the locking rod 2332. The first locking head 23311 cooperates with the first limiting seat 2311, and the second locking head 23312 cooperates with the second limiting seat 2312. Specifically, the locking rod 2332 passes through the through hole 231A at the bottom of the limiting assembly and the second locking head 23312 in sequence. After the hinge hole 221A on the B side of the second folding arm 22 is engaged, it is threadedly connected to the internal thread of the hinge hole 221A on the C side of the second folding arm 22. At this time, the first locking head 23311 is abutted against the first limit seat 2311, and the second locking head 23312 is abutted against the second limit seat 2312, so as to realize the threaded connection between the locking rod 2332 and the internal thread of the hinge hole 221A on the C side of the second folding arm 22. The first locking head 23311 and the first limit seat 2311 are squeezed against each other, and the second locking head 23312 and the second limit seat 2312 are squeezed against each other, so that the first folding arm 21 and the second folding arm 22 are positioned, further realizing the positioning of the folding device 20.

[0051] Here, the first folding arm 21 and the second folding arm 22 in the positionable folding device 20 connected to the chassis 12 device 10 are hinged and locked and positioned by a locking mechanism 23. One end of the first folding arm 21 is connected to the chassis 12, and the other end is provided with a hinge head 211. The hinge seat 221 at one end of the second folding arm 22 cooperates with the hinge head 211 of the first folding arm 21, and the hinge seat 221 at the other end of the second folding arm 22 is hinged to the ship bell body 30. At the same time, the bell mouth radius L1 of the ship bell body 30 is smaller than the length L2 of the second folding arm 22, and the length L3 of the first folding arm 21 is greater than the height H of the ship bell body 30, so that a ship bell can be installed both on the wall and on the floor, thereby improving the environmental adaptability of the ship bell.

[0052] For ease of understanding, the working principle of the present application is further described as follows: When a ship bell for a yacht is wall-mounted, the operator first fixes the chassis 12 set 11 to the wall of the yacht with bolts in advance according to the installation height, and adjusts the locking head 2331 so that the first folding arm 21 and the second folding arm 22 can rotate freely around the axis. Thereafter, the first folding arm 21 and the second folding arm 22 are flipped over so that the first folding arm 21 and the second folding arm 22 are rotated along the hinge axis respectively until the first folding arm 21 and the second folding arm 22 are horizontal and the limiting piece 2211 abuts the first folding arm 21, and the locking head 2331 is rotated until the locking rod 2332 is tightly fitted with the hinge hole 221A on the side of the second folding arm 22C. At this time, the ship bell body 30 is flipped over so that the ship bell body 30 is rotated around the hinge axis to be vertically downward. Finally, the chassis 12 is matched with the chassis 12 set 11, and the wall-mounted installation of the ship bell body 30 is completed.

[0053] When performing floor-standing installation, the operator first adjusts the locking head 2331 so that the first folding arm 21 and the second folding arm 22 can rotate freely around the axis. Then, the first folding arm 21 and the second folding arm 22 are flipped over so that the first folding arm 21 and the second folding arm 22 are rotated according to the hinge axis respectively until the second folding arm 22 abuts against the card table 212. At this time, the locking head 2331 is rotated until the locking rod 2332 is tightly fitted with the hinge hole 221A on the side of the second folding arm 22C. At this time, the ship bell body 30 is flipped over so that the ship bell body 30 is rotated around the hinge axis to vertically downward. Finally, the operator confirms the installation position and bolts it to the mounting table through the connecting hole 121 on the chassis 12, thereby completing the floor-standing installation of the ship bell body 30.

[0054] Although the present application has been described and illustrated with reference to specific embodiments of the present application, these descriptions and illustrations do not limit the present application. It will be clearly understood by those skilled in the art that various changes may be made and equivalent elements may be substituted within the embodiments without departing from the true spirit and scope of the present application as defined by the appended claims. The illustrations may not necessarily be drawn to scale. Due to variables in the manufacturing process, etc., there may be differences between the technical reproduction in the present application and the actual implementation. There may be other embodiments of the present application that are not specifically described. The description and illustrations should be regarded as illustrative, not restrictive. Modifications may be made to adapt specific circumstances, materials, compositions of matter, methods or processes to the objectives, spirit and scope of the present application. All such modifications fall within the scope of the appended claims. Although the methods disclosed herein have been described with reference to specific operations performed in a specific order, it should be understood that these operations may be combined, subdivided or reordered to form equivalent methods without departing from the teachings of the present application. Therefore, unless specifically indicated herein, the order and grouping of operations do not limit the present application.

Claims

1. A yacht bell, characterized in that: include A detachable chassis device (10), comprising a chassis cover (11) and a chassis (12) sleeved inside the chassis cover (11), wherein the chassis (12) and the chassis cover (11) are detachably connected, wherein an opening (111) is provided on the side A of the chassis cover (11), and a connecting hole (121) is provided on the chassis (12); A positionable folding device (20) connected to the chassis device (10), the folding device (20) comprising a first folding arm (21), a second folding arm (22) hinged to the first folding arm (21), and a locking mechanism (23), one end of the first folding arm (21) being connected to the chassis (12), and the other end thereof being provided with a hinged head (211), and opposite ends of the second folding arm (22) being provided with hinged seats (221), the hinged seat (221) at one end thereof being matched with the hinged head (211) of the first folding arm (21); The ship bell body (30) is hinged to the folding device (20), and the ship bell body (30) cooperates with the hinge seat (221) at the other end of the second folding arm (22). The bell mouth radius L1 of the ship bell body (30) is smaller than the length L2 of the second folding arm (22), and the length L3 of the first folding arm (21) is greater than the height H of the ship bell body (30).

2. The yacht bell according to claim 1, characterized in that: A clamping platform (212) is provided on one end of the first folding arm (21) close to the hinge joint (211), and the clamping platform (212) is in contact with the second folding arm (22).

3. The yacht bell according to claim 2, characterized in that: A limiting piece (2211) is provided on the hinge seat (221) on the second folding arm (22) close to one end of the first folding arm (21), and the limiting piece (2211) cooperates with the first folding arm (21).

4. The yacht bell according to claim 1, characterized in that: The locking mechanism (23) includes a limit seat assembly (231), a plug (232) and a locking assembly (233); the limit seat assembly (231) is fixed to the B side of the hinge seat (221) on the second folding arm (22) close to one end of the first folding arm (21); the plug (232) is fixed to the C side of the hinge seat (221) on the second folding arm (22) close to one end of the first folding arm (21); and the locking assembly (233) passes through the limit seat assembly (231) and is threadedly connected to the hinge seat (221).

5. The yacht bell according to claim 4, characterized in that: The limiting seat assembly (231) includes a first limiting seat (2311) and a second limiting seat (2312) arranged inside the first limiting seat (2311), a reinforcing rib (2313) is further provided between the first limiting seat (2311) and the second limiting seat (2312), a limiting platform (2311A) is provided inside the first limiting seat (2311), and the height of the second limiting seat (2312) is lower than the height of the limiting platform (2311A).

6. The yacht bell according to claim 5, characterized in that: The bottom of the limiting seat assembly (231) is also provided with a through hole (231A), the through hole (231A) is connected to the hinge hole on the hinge seat (221), and the center points of the first limiting seat (2311), the second limiting seat (2312), the through hole (231A) and the hinge hole (221A) all coincide.

7. The yacht bell according to claim 6, characterized in that: The hinge hole (221A) on one side of which the plug (232) is fixed is provided with an internal thread.

8. The yacht bell according to claim 7, characterized in that: The locking assembly (233) includes a locking head (2331) and a locking rod (2332) connected to the locking head (2331), and the locking head (2331) includes a first locking head (23311) and a second locking head (23312) connected to the first locking head (23311), and the first locking head (23311), the second locking head (23312) and the locking rod (2332) are arranged in sequence along the F direction. A locking head (23311) cooperates with the first limit seat (2311), and the second locking head (23312) cooperates with the second limit seat (2312). The locking rod (2332) passes through the through hole (231A) in turn and penetrates the limit seat assembly (231), and then passes through the hinge hole (221A) and penetrates the C side of the hinge seat (221), and is threadedly connected with the internal thread on the D side of the hinge seat (221).